Omron CJ1W-SCU32 Operation Manual page 290

9 Troubleshooting and Maintenance
Error conditions
Serial Indicator
communications display
mode
The serial commu- ---
nications mode is
set to No-protocol
Mode.
9-12
Confirmation of device
variable for CJ-series Unit, etc.
Status and
other
conditions
With Unit: The The Error output variable from the
SerialRcv or SerialRcv or SerialRcvNoClear
SerialRcvNo- instruction is TRUE.
Clear instruc-
tion was
executed, but
data was not
received.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Cause Remedy
• This instruction • Review the set-
was executed tings in the Serial-
when the Serial Rcv or
Communications SerialRcvNoClear
Mode was not No- instruction.
protocol Mode.
• Review the pro-
• _Port_isAvailable gram for instances
is set to FALSE. where the causes
specified on the
• The value of
left might occur.
Port.UnitNo or
Port.PhysicPortNo
is out of the valid
range.
• The Serial Com-
munications Unit is
not mounted at the
specified Unit
number.
• The value of Store-
Size is out of valid
range.
• The value of Store-
Size exceeds the
size in DstDat[].
• This instruction
was executed
while the unit was
restarting.
Command end code: Insert an AND in the
2201 hex (not possi- input condition for a
ble during execu- Network Communi-
tion) was returned. cations Instruction
Enabled Flag
If the SerialRcv or
(_Port_isAvailable).
SerialRcvNoClear
instruction was exe-
cuted, the operation
is disabled because
the port is busy
receiving data.
Command end code: Insert an AND in the
2202 hex (not possi- input condition for an
ble while stopped) N.C. of the Serial
was returned. Exe- Communications
cution is not possible Unit's Port 1/2 Set-
while the protocol is tings Changing Flag
switched. (_CJB_SCU**P1(orP
2)ChgSta: Unit num-
ber **).